How can I turn off texture filtering on procedurally generated textures?

Hi everyone, I'm using the script below to generate a terrain texture onto a plane using perlin noise. The problem is, I'm going for a pixel art look and all of the pixels are smoothed into eachother, which looks especially bad if the image is small, for example 16x16. Is there a way to turn off texture filtering in code for the generated texture so that I can get sharp pixels?

 using UnityEngine;
 using System.Collections;
 
 public class PerlinExample : MonoBehaviour {
 
     public int pixWidth;
     public int pixHeight;
     public float xOrg;
     public float yOrg;
     public float scale = 1.0f;
     private Texture2D noiseTex;
     private Color[]pix;
     
     void Start(){
         noiseTex = new Texture2D(pixWidth, pixHeight);
         pix = new Color[noiseTex.width * noiseTex.height];
         renderer.material.mainTexture = noiseTex;
         CalcNoise();
     }
     
     void CalcNoise(){
         float y = 0.0f;
         while (y < noiseTex.height){
             float x = 0.0f;
             while (x < noiseTex.width){
                 float xCoord = xOrg + x / noiseTex.width * scale;
                 float yCoord = yOrg + y / noiseTex.width * scale;
                 float sample = Mathf.PerlinNoise(xCoord, yCoord);
                 pix[(int)y * (int)noiseTex.width + (int)x] = new Color(sample, sample, sample);
                 x++;
             }
             y++;
         }
         noiseTex.SetPixels(pix);
         noiseTex.Apply();
     }
 }